Synthesis and characterizations of highly conductive and stable electrolyte Li10P3S12I
By Feng, Xuyong; Chien, Po-Hsiu; Patel, Sawankumar; Zheng, Jin; Immediato-Scuotto, Marcello; Xin, Yan; Hung, Ivan; Gan, Zhehong; Hu, Yan-Yan
Published in Energy Storage Materials
2019
Abstract
A novel glass-ceramic solid electrolyte Li10P3S12I is synthesized, which delivers a high ionic conductivity of 6.4 mS/cm at 25 °C and a low activation energy of 0.26 eV. Li10P3S12I also exhibits significantly enhanced stability and low interfacial resistance against Li metal compared with thiophosphates. Tracer-exchange Li NMR reveals that lithium ions transport preferably through the glass phase and glass-ceramic interface in Li10P3S12I. Careful control of the synthesis process to avoid complete crystallization helps stabilize the highly Li-conductive phase.